I thought that this calculation would be a lot better, only now the number of persons =2 comes out at €2,696.40….
if([item-286_isChecked]&&[item-418_quantity] ==2) {
[price] = [item-286_price]*4
}
if([item-286_isChecked]&&[item-418_quantity] ==4) {
[price] = [item-286_price]*8
}